用户在一次计算过程中，或者一次事务处理中，要求计算机完成所做的工作的集合，这是指（）。
A. 进程
B. 程序
C. 作业
D. 系统调用
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According to the passage, the total supply of food in America every year reaches ______.
A. 12 million pounds
B. more than 12 million pounds
C. almost 100 billion pounds
D. about 400 billion pounds
文件目录表（FDT）和文件分配表（FAT）互相结合管理整个磁盘文件，下面不是文件目录表记录的与文件相关的信息是（）。
A. 文件名
B. 起始簇号
C. 已分配的簇
D. 文件属性
In the last paragraph, the writer seems to suggest that ______.
A. interviewees should appear humble ff they can't give an answer
B. dressing properly is more important than being able to give an answer
C. it is better for interviewees to be honest than to pretend to understand
D. it is a good idea for interviewees to be boastful in their answers
如果文件系统中有两个文件重名，不应采用（）。
A. 一级目录结构
B. 树形目录结构
C. 二级目录结构
D. A和C
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